Pipe-cutter



I. W. NONNE-MANJ PIPE CUTTER.

APPLICATION FILED JAN-18.1917.

Patented July 22, 1919.

3 SHEETS-SHEET I 0 4. 5 v r m 5 M n m. W J 7W1 1 .H w M INMENIQJZ AT T I I. W. NONNEMAN.

PIPE CUTTER.

APPLICATION FILED JAN-18.19l7.

Patented July 22, 1919.

3 SHEETS-SHEET 2.

IWEMOR,

73m; m ma THE COLUMBIA PLANDGIMIII cO., WASHINGTON. n. c.

l. W. NONNEMAN.

PIPE CUTTER.

APPLICAHON FILED JANJIB. I917 Patented July 22, 1919.

3 SHEETS-SHEET 3.

Jn/Pn 2017' THE COLUMBIA PLANOGRAPH cm, WASHINGTON. n. c.

TED STATES PATENT OFFICE.

IRA W. NONNEMAN, 0F WARREN, OHIO, ASSIGNOR TO THE. BO'RDEN COMPANY, OF

WARREN, OHIO, A CORPORATION OF OHIO.

PIPE-CUTTER.

Application filed January 18. 1917. Serial No. 142,990.

To all whom 2'26 may concern: Be it known that I, IRA W. NONNEMAN, a citizen of the United States; residing at lVarren, in the county of Trumbull and State of Ohio, have invented a certain new and useful Improvement in Pipe-Cutters, of which the following is a full, clear, and eX- act description, referencebeing had to the accompanying drawings.

This invention relates to pipe cutters of the type Wl16l6111 the cutting members are carried by an annular'rotary frame adapted to surround the pipe and means are pro- Vided for feeding such cutting membersin wardly. The general object of the invention is to' provide a cutter of this type which shall be simple, effective and durable.

One of the objectsof the invention is to so construct the pipe cutter frame that it may be easily divided into two or more parts, allowing it to be placed over an intermediate portion of a pipe and readily clamped together in operative position thereon.

Another object is to cause equal and even feeding of the several cutting tools and urge them into the pipe with substantially equal pressure. Still another object is to secure uniform and comparatively free rotation of the frame about the pipe, which I accomplish by providing a separable circular hearing support adapted to embrace and be clamped in position about the pipe, and

which carries and centers the rotary toolcarrying frame. A feature o-fthe construction just mentioned is that it lends itself readily to the use of convenient actuating mechanism connecting the support and the rotary frame, for rotating such frame about the pipe. Such mechanism may be readily adapted for operation in limited quarters.

My invention is hereinafter more fully accompanying drawings, and its novel characteristics are summarized in the claims.

In the drawings, Figure 1 is an elevation of the end of my device looking toward the cutters; Fig. 2 is a plan view showing the cutter frame assembled about a pipe; F1g. 3

is a rear end elevation of my ipe cutter illustrating the method of separating the frame sections for placing the same about the intermediate portion of a pipe; Fig. 4 is an axial section through the cutter frame showing the guide ring in elevation; Fig. 5 is an enlarged section through one of the cutter slides; Fig. 6 is a section on the cutter carrier showing the spring feeding mechanism, the section being taken substantially on the line 66 of Fig. 5; Fig. 7 is a section on a radial plane showing the cutter feeding scroll and gear for rotating the same. Fig. 8 is an enlarged transverse section of the cutter taken between the scroll ring and. the plate carrying the knives, as indicated by the line 88 on Fig. 4:; Fig. 9 is a detail of one of the knife carriers, being a transverse section 'on the offset line 9 -9 on Fig. 5.

Designating the parts by reference characters, 1 and 2 indicate the two substantially semi-circular parts of the hearing or sup porting ring, shown as provided with outwardly extending ears 3 through which extends a securing bolt or screw 4.. Adjacent to the ear 3 on the ring section 1 is an ear 5 ach-pted to be embraced on opposite sides by circumferentially extending ears 6 on the ring 2 projecting over the adjacent end of the ring member 1 and adapted to be secured thereto by a screw 7 This bearing-support, when secured together by the screws 4 and 7, may be centered about a pipe by radial screws 8 in the ring section 1, and 9 and 10 on the ring section 2.

The bearing-support pipe for a short distance and is provided with a cylindrical bearing surface between two annular ribs 12 and 13, and rotatably fitted into this hearing groove are inwardly projecting bearing ribs of the cutter frame body members 15 and 16 secured together by screws 17 passing from ears 14. These members are also shown as forming the two separable segments of an annular body which extends outwardly, and also rearwardly. and carries a ratchet flange 18. In the radially extending portion, one face of which is finished, I form an annular groove adapted to receive gear teeth 20 of a disk ring 22 made up of two semi-circular seg- Patented July 22, 1919.

ments and provided with a scroll-shaped thread or rib 21 on the face opposite the teeth 20. This ring 22 is provided with an offset shoulder :23 rotatably engaged by a cover 25 screwed onto the radial face of the members 15 and 16 and comprising twosemi-circular parts meeting at their ends and thus separable on the same diametric plane as the scroll ring. These cover parts also have annular shoulders serving to 1'0- tatably engage and center the scroll ring; intermediate of the shoulders is an outwardly offset annular portion 26 housing the scroll teeth 21.

The cover members 25 are provided with radial guiding ribs 30, which position the cutter heads 32, each of which has a slide portion 31 embraced by the ribs 30 and prevented from displacement by splines 33. The cutter heads are provided on the inner face of their guide portions with segmental teeth 40 engaged by the scroll thread, whereby, upon the rotation of the scroll, the cutter heads are caused tomove inwardly or outwardly with relation to the frame.

As a convenient means for rotating the scroll, I provide a bevel pinion 14 (Fig. 7) rotatably mounted in bearings formed between a portion of the member 16 and a cover and having an angular shank 46 which may be engaged by a suitable socket wrench to impart rotation to the scroll The cutter heads are shown as carrying movable slides 50, embraced at the sides by guide walls nd held in position by a removable cover plate 52 and urged inwardly toward the pipe by a compression spring 53. This spring is shown as a flat strip bent several tlmes upon ltself and bearing atone end against the cutter head and at the other end on a shoulder 54 of the cutter carrier to which the cutters are shown as secured by screws 62.

The plates 52' are preferably cut away as indicated in Fig. 1 to permit movement of the screws 62 as the cutter and its carrier moves in the guideway formed in the cutter head and beneath the plate 52.

The cutters are shown as formed of flat plates and are preferably provided with a cutting edge, as indicated at 63, and a guiding stop 64 ahead of the cutting edge and within its path and adapted to limit the inward movement of the cutter so that as the cutters are working and being urged into the metal by the spring 53, the depth of the cut is limited to the proper amount by this stop. The inward movement of the cutter carrier is limited by a screw 56 extending through the wall of the guide 32 and engagingan elongated slot 57 in the cutter carrier.

The feeding of the cutters is accomplished by rotating the gear 44: of a suitable hand wrench to rotate the scroll and move all the cutter heads inwardly the same amount simultaneously bringing the cutters into engagement with the pipe. Further inward movement of the cutter heads compresses the springs 53 which in turn urge the cutters into the pipe as the frame is rotated. The springs may be compressed a little at a time as the cutting progresses, or the cutter heads may be set way down compressing the springs sufficiently to feed the cutters entirely through the pipe.

To prevent setting the cutter heads too tightly. into engagement with the pipe and thereby preventing rotation, I have provided rollers 67 in the cutter guides proj ecting inwardly therefrom so that they engage the'pipe instead of the other parts of the cutter carrier andhead. These rollers may limit the inward movement of the cutter heads while preventing them being clamped tightly into engagement with the pipe and interfering with' the rotation thereof.

The means for rotating the cutter frame after the bearing and frame have been assembled over a pipe preferably comprises a lever arm 80 pivoted at 81 between the ears 6 heretofore mentioned and pivotally connected by a link 83 with an oscillating rider 85 which has means (notshown) for urging a dog 86 into engagement with ratchet teeth 87 formed on the flange 18 heretofore mentioned. The lever arm 80 is preferably provided with a threaded socket adapted to receive a pipeVSQ which may be used as an actuating leverhan-dle. The rider 85 is held'in position by engagement with the groove 84 and by embracing the sides of the flange 18. As the lever 80 is reciprocated the rider is caused to move idly over the teeth 87 in one direction and in the other direction to engage these teeth and cause a relative movement of the cutter frame with the guiding bearing. The screw 10 is preferably made headless and provided with a screw driver slot so that it may not interfere with the movement of the rider and link 83.

I prefer not to depend upon the screws 17, extending through :the ears 14L to hold the frame in position, and accordingly I use, in addition, straps 70 projecting across the division of the frame segments and secured by removable screws 7 2. The removal of one of these screws and the loosening of the other permits the strap to swing outwardly in the position shown in Fig. 3, so that the frame may be separated by removing the screws 4.

From the foregoing description it will be seen that I have provided apipe cutting device having a plurality of cutters which may i be fed evenly intozthe pipe. My cutter may be clamped onto the pipeeither by moving the entire frame endwise overwthe pipe or may be, divided andassembled in position over an intermediate portion of a pipe, as desired. The feeding of the cutters is accomplished by actuating. the scroll ring to move all the cutter guides inwardly the proper distance, whereupon the spring urges the cutters into the pipe consequent upon the rotation of the cutter frame with relation to its positioning bearing. The cutter frame and positioning bearing may be readily separated intotwo parts without otherwise disassembling the mechanism and equally readily reassembled over a pipe, or after removal therefrom.

To enable the convenient positioning of the split ring with its plane of separation springs are likewise inclosed Within the housings carried by the slides and are also protected.

Having thus described my invention what Iclaimis: v I

l. The combination of a separable annular cutter frame, cutters carried thereby and a scroll ring. inclosed within the cutter frame and adapted to feed the cutters, said ring being separable on planes coincident with planes of separation of the frame.

2. The combination of a separable annular cutter frame, cutters carried thereby, a

separated scroll ring operatively connected with the cutters, and housed within an annular space in the frame and provided with gear teeth, and a rotary pinion carried by.

the frame and having teeth engaging the teeth on the ring.

3. In a device of the character described, the combination of a frame adapted to be separated into sections, cutters and movable slides therefor carried by the frame, means for causing simultaneous movement of the slides to feed the cutters inwardly, including a revoluble scroll ring split into sections and inclosed within the frame and connected with the cutter slides, means for removably I securing the frame sections together, and

means for revolving the ring sections after theinanner of a complete ring when assembled, said frame and rings beingsplit substantially on the same radial planes.

4.. In a device of the character described, the combination of a divided frame adapted to surround apipe, a divided revoluble ring housed therein and-having a scroll rib thereon, slides movably carried by the frame and having teeth engaged by said rib, whereby the rotation of the ring may cause inward and outward movement of the slides, cutters, and springs connecting them yieldingly with the slides.

5. The combination of a rotary frame, a scroll ring carried thereby, slides mounted in the frame and connected with said ring, each of said slides being provided with a limiting roller adapted to engage the pipe being cut, cutters movably mounted on said slides, and springs yieldingly connecting the cutters to the slides.

6. In a pipe cutter, the combination of a separable frame adapted to surround a pipe, a separable scroll ring housed within the frame and provided with a bevel gear, cutter carriers having teeth engaging the scroll ring, and a bevel pinion engaging the bevel gear.

7 In a device of the character described, the combination of an annular frame separable on a diametric plane, a scroll ring housed within the frame and carrying a gear, said ring and gear being separable on a plane coincident with frame, a pinion engaging said gear and adapted to turn it on its aXis,,a housing guided to move radially on the frame and having a projection cooperating with the scroll ring, and a cutter carried by the housing.

8. In a device of the character described, the combination of anannular frame, comprising two'ring-like members secured together face to face, there being a groove in y the face of one of the members, a scroll ring occupying said groove and facing the other member, radial guideways on said other member, housings slidable in said guideways and having teeth engaging the scroll ring, and cutters carried by the housings, the two parts of the frame and the scroll ring being all separable on the same diametric plane.

9. In a pipe cutter, the combination of an annular frame, a scroll ring carried thereby, radial guideways carried by the frame, cutter housings slidably mounted in the guideways and having teeth engaging the scroll ring, each housing having a portion movable radially relative to the part having the teeth, a cutting knife carried by said relatively movable portion, and a spring within the housing tending to press said relatively movable portion toward the axis of the cutter.

10. In a device of the character described,

the combination of an annular frame, a

' by the ribs of a pair, said slide having teeth engaging the scroll ring, each cutter head having a member movably mounted Within it, a spring pressing said member, toward 10 the axis of the tool, and a knife secured to said member.

In testimony whereof, I hereunto aflix my signature.

IRA W. NONNEMAN.

Copies of this patent may be obtained for five cents each, byaddressing the Gommissioner of Patent: Washington, D. G. 

